Patricia O’Callaghan, a vocalist with Tom Allen’s production of Weimar to Vaudeville will be the featured host of CBC Radio Two’s program This is My Music, Saturday July 21, 10 a.m. to noon. For an insight into this talented performer, who will be seen on the Highlands Summer Festival Stage  July 25-27, be sure to tune in.   Each week, This Is My Music is hosted by one of Canada’s foremost international classical artists. The host selects a program of mainly classical music and presents it in a lively, engaging manner, enriched with personal anecdotes and insights.